#include "bits/stdc++.h" #define REP(i,n,N) for(int i=(n); i<(N); i++) #define RREP(i,n,N) for(ll i=(N-1); i>=n; i--) #define CK(n,a,b) ((a)<=(n)&&(n)<(b)) #define ALL(v) (v).begin(),(v).end() #define p(s) cout<<(s)<> typedef long long ll; using namespace std; const ll mod= 1e10; int x,y,z,D1,D2; int main(){ int lb=-101,ub=100; while(ub-lb>3){ int mid1=(lb * 2 + ub) / 3; //三等分して左を選ぶ int mid2=(lb + ub * 2) / 3; //三等分して右を選ぶ cout<<"? "<>D1; cout<<"? "<>D2; if(D1 > D2) lb=mid1; //左側の領域を捨てる else ub = mid2; } int mn=500; REP(i,lb,lb+3){ cout<<"? "<>D1; if(mn>D1){ x=i; mn=D1; } } lb=-101,ub=100; while(ub-lb>3){ int mid1=(lb * 2 + ub) / 3; //三等分して左を選ぶ int mid2=(lb + ub * 2) / 3; //三等分して右を選ぶ cout<<"? "<>D1; cout<<"? "<>D2; if(D1 > D2) lb=mid1; //左側の領域を捨てる else ub = mid2; } mn=500; REP(i,lb,lb+3){ cout<<"? "<>D1; if(mn>D1){ y=i; mn=D1; } } lb=-101,ub=100; while(ub-lb>3){ int mid1=(lb * 2 + ub) / 3; //三等分して左を選ぶ int mid2=(lb + ub * 2) / 3; //三等分して右を選ぶ cout<<"? "<>D1; cout<<"? "<>D2; if(D1 > D2) lb=mid1; //左側の領域を捨てる else ub = mid2; } mn=500; REP(i,lb,lb+3){ cout<<"? "<>D1; if(mn>D1){ z=i; mn=D1; } } cout<<"! "<